Micro-nano bubbles, with their unique physicochemical properties, have opened up new pathways in water treatment when combined with ozone technology.
Research shows that this system offers multiple advantages.
On one hand, micro-nano bubbles significantly enhance the gas-liquid transfer efficiency of ozone—under the same conditions, their mass transfer coefficient can reach 3.6 times that of conventional bubbles. Ozone concentration peaks notably increase, and its retention time in water extends by approximately 40%.
On the other hand, the interfacial effects of micro-nano bubbles catalyze the decomposition of ozone, generating a large number of hydroxyl radicals. With an oxidation-reduction potential as high as 2.8V, these radicals can non-selectively degrade stubborn organic pollutants such as phenols and antibiotics.
Advantages of Nano Bubble Ozone Water
Stable and Long-lasting
Nano bubbles keep ozone sealed in water, maintaining high concentration and activity while preventing gas escape.
Deep Cleaning
Combines the strong penetration of nano bubbles with the powerful oxidation of ozone for thorough, all-around cleaning.
Safe and Green
Ozone remains fully contained in water without being released into the atmosphere, ensuring safe operation and no secondary pollution.
Engineering data indicate that this technology improves COD removal efficiency by over 60% compared to ozone treatment alone, reduces operational energy consumption by about 30%, and produces no secondary pollutants like bromate.
From a mechanistic perspective, micro-nano bubbles enhance ozone efficiency through three key mechanisms:
First, their enormous specific surface area (the surface area of a 1μm bubble is 1,000 times that of a 1mm bubble) creates highly efficient gas-liquid interfaces.
Second, the localized high temperature and pressure generated during bubble contraction and collapse promote free radical chain reactions.
Third, the surface charge effect enriches pollutants at the gas-liquid interface, increasing reaction probability. These properties systematically address the limitations of traditional ozone technologies, such as restricted mass transfer, high oxidation selectivity, and low utilization rates.
Currently, this technology has been successfully applied in multiple scenarios, including advanced treatment of pharmaceutical wastewater, disinfection of oilfield produced water, and restoration of landscape water bodies.
Case studies show that after adopting the ozone-micro-nano bubble combined process, ozone dosage is reduced by 25%–40%, sludge production decreases by about 20%, and effluent toxicity is significantly lowered.
With the integration of intelligent control systems, this technology is evolving toward precision and low-energy consumption, offering a competitive solution for the green transformation of the water treatment industry.
